Paint and Body Finishing Materials

Hello All. Just a question where MOST of us have had to bite the bullet. Are there any paint products out there where the primer sealers seal well and won't gas out through your finish product, where the primer surfacers work well and won't make your arm drop off, where the paints look great, and the clears are clear and will hold up and stay clear, and as you may know where I am going, wont break the bank. I will be having slightly over $20K total cost in my 65 Dart restoration with a new engine, rebuilt transmission, rebuilt back end, all new interior, and some new/restored trim and chrome. The point is that the primer sealers, surfacers, paint, clears, and other needed materials for a quality paint job are all now purchased with a price tag exceeding 16% of the cost of the restoration....doing the body and paint myself. I am choosing, currently, to use a quality top of the line product, but, man, there has got to be a less expensive way using products that can be trusted. Any advice on good quality paint supplies that will work out nicely, look good, and stand the test of time. I know the company that I buy from has good stuff, but at a good price that is becoming unaffordable in restoring our classic beauties. Not a rant, just a question? Appreciate it. Old Dart 66